/* ========================
   Header
   ======================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  display: flex;
  align-items: center;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
}

.header__logo svg {
  width: 36px;
  height: 36px;
}

.header__nav {
  display: none;
  align-items: center;
  gap: var(--space-xl);
}

.header__nav a {
  color: var(--color-text-light);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-sm) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.header__nav a:hover,
.header__nav a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.header__cta {
  display: none;
}

.header__menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text);
}

.header__menu-btn svg {
  width: 24px;
  height: 24px;
}

@media (min-width: 768px) {
  .header__nav {
    display: flex;
  }

  .header__cta {
    display: block;
  }

  .header__menu-btn {
    display: none;
  }
}

/* ========================
   Mobile Navigation
   ======================== */
.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 300px;
  max-width: 80vw;
  background: var(--color-white);
  z-index: 200;
  transform: translateX(100%);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
}

.mobile-nav.is-open {
  transform: translateX(0);
}

.mobile-nav__backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 199;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.mobile-nav__backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

.mobile-nav__links {
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  gap: var(--space-xs);
}

.mobile-nav__links a {
  display: block;
  padding: var(--space-md) var(--space-sm);
  color: var(--color-text);
  font-size: var(--text-lg);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.mobile-nav__links a:hover,
.mobile-nav__links a.active {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* ========================
   Footer
   ======================== */
.site-footer {
  background: var(--color-primary-dark);
  color: var(--color-white);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.footer__brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-sm);
  margin-top: var(--space-sm);
}

.footer__title {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-md);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__links a {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-white);
}

.footer__contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-sm);
  margin-bottom: var(--space-sm);
}

.footer__contact-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.6;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
}

.footer__copyright {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-xs);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ========================
   Grid Utilities
   ======================== */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ========================
   Sidebar Layout
   ======================== */
.sidebar-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .sidebar-layout {
    grid-template-columns: 280px 1fr;
  }
}

/* ========================
   Page Content Offset
   ======================== */
.page-content {
  padding-top: var(--header-height);
}